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CATELLUS DEVELOPArIE11TT CORPORATION <br /> Date 5/6/97 <br /> WEST WEBER SITE,STOCKTON Setup time 1550 <br /> QUARTERLY GROUNDWATER SAMPLING Weather Clear,Windy <br /> FI£LD NOTES I ERM WEST 299600 ISamplers. DEM/CJH <br /> ' WELL # MW-5 <br /> HISTORIC CONCENTRATIONS <br /> ' Location Construction Depth 16 ft bgs <br /> Construction 2 inch pvc/ Measured Depth 16 14' <br /> ' Groundwater Zone Purge Method Grundfos Pump (2") <br /> Screened Interval 11-16 ft bgs Pump Intake —10 <br /> ' Sample Method Disposable Bailer Depth to Water 5 08 <br /> Sample Preservation Method Ice Height of Water Column 1106' <br /> Volume of one casing 180 gallons <br /> Purge Start Date 5/6/97 <br /> Purge Start Time 1555 Purge calculations <br /> Discharge Rate —1 gpm 1106 ft x 163 gals / ft x 3= <br /> Purge End Time 1601 5 41 gallons <br />' Time Gallons Temp'C pH EC"/cm Water clanty <br /> 1557 2 2202 700 889 Clear <br /> 1559 4 2173 683 1127 Clear � <br /> 1601 6 2171 679 1105 Clear <br /> ANALYSES REQUIRED SAMPLE TIME CONTAINER TYPE FILTRATION? <br /> Fe+2 1610 2 x 40 ml VOA HCL <br />' pH,Conductivity,Chloride 500 ml Poly <br /> Nitrate 500 ml Poly H2SO4 In the Field <br /> Dissolved Methane,Dissolved CO2 2 x 40 ml VOA <br /> BTEX,Trimethylbenzene,TPHg 4 x 40 ml VOA HCL <br /> TPHd 2 x 1 Liter Amber Glass <br /> Dissolved Mn 500 ml Poly HNO3 In the Field <br /> Heterotrophic Plate Count 125 ml Plastic Na Thiosulfate In the Field <br /> FIELD OBSERVATIONS(Well condition,repairs needed) <br /> PID reading when well cap opened 0 0 ppm Disposal method of purge water Drummed on site <br /> iDissolved Oxygen reading 198 mg/1 Decontamination procedure Alconox/DI Rinse <br /> Redox Measurement -104 mV <br /> Other notes <br /> r � <br /> Sampler Signature(s) ! � <br />' •v 4 <br />